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I want to ask 13.1 question 3.. please explain

Posted by Saloni Gupta 5 years ago

CBSE > Class 09 > Mathematics

1 answers

Chaitanya Goravar 5 years ago

Given: perimeter of rectangular wall =2(l+b)=250m (1) Now area of the four walls of the room =total cost to paint walls of the room ________________________________ Cost to paint 1m² of the wall =15000 = 1500 m² (2) ________ 10 Therefore, area of the four walls = lateral surface area 2(bh+hl) = 2h(b+l) =1500 250×h = 1500 (from equation 1 & 2) h = 1500 ________ =6m 250 Hence, required height of the hall is 6m.

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